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Inspired by Rob Cosman's Kerf X - 10

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Project by bluekingfisher posted 11-18-2018 04:09 PM 1619 views 3 times favorited 18 comments Add to Favorites Watch

While perusing some dovetailing websites a few days back I came across a particular hand tool on Rob Cosman’s site, which he sells to assist with the completion of the saw kerf cut prior to chopping the waste out on half lap dovetails, such as on drawer fronts, as shown in the test piece in photo 5 above.

Below is the tool Rob sells on his site. He refers to it as a Kerf X -10.

There did not seem much to it and it could prove a useful hand tool in the future so I thought I would give it a go at making my own. It was surprisingly simple to make. I bought a small 8” back saw for £2.49. + shipping of a similar amount as the donor tool.

I only required the plate and the brass spine so the saw nuts were salvaged and set aside for another project.

I cut out the plate and brass spine with a 4” grinder as can be seen in photo 6 above. I then formed a small 1/4” tapered tenon using the grinder.

.

I had bought a box full of discarded bubinga tool handles at a woodworking show several year so ago for a couple of quid. I still had a few left. The handles had been discarded because the holes had been drilled off centre. This flaw actually suited my need as it would mean less grinding on my part to,eunsure the top of the spine was level with the ferrule on the handle. More for aesthetic than anything else.

.

It was just a case of tapping the tenon into the handle then securing it with a two part expoxy. A quick polish at the mop then I was done. Made in about 90 mins, well,worth the effort I think?

I made it to the same dimensions as the tool listed on Robs web page. Thanks Rob. The blade is 2 3/4” long x 3/4” deep, overall about 7”.

I think I actually prefer the look of mine, of course I would say that.

Thanks for looking

David.

-- No one plans to fail, they just, just fail to plan





18 comments so far

View daiku_padawan's profile

daiku_padawan

108 posts in 678 days


#1 posted 11-18-2018 05:22 PM

Pretty little tool.

-- ~Daniel

View Jim Rowe's profile

Jim Rowe

1091 posts in 2761 days


#2 posted 11-18-2018 06:44 PM

That not only looks great but will also do the business! It’s very satisfying to make your own tools and put them to good use. What tooth pattern did you create?
Jim

-- It always looks better when it's finished!

View ralbuck's profile

ralbuck

6094 posts in 2715 days


#3 posted 11-19-2018 12:44 AM

Always nice to make tools that you will use.

-- Wood rescue is good for the environment and me! just rjR

View Rick  Dennington's profile (online now)

Rick Dennington

6600 posts in 3643 days


#4 posted 11-19-2018 01:44 AM

Once again pal you’ve outdone yourself….The saw kerf tool looks great….You’ve really gotten into the saw business….and making this one yourself is a winner….Nice going, friend, and keep up the good work…..!!

-- " At my age, happy hour is a 2 hour nap".....!!

View swirt's profile

swirt

4060 posts in 3421 days


#5 posted 11-19-2018 02:46 AM

Nice creative tool.

-- Galootish log blog, http://www.timberframe-tools.com

View bluekingfisher's profile

bluekingfisher

1333 posts in 3429 days


#6 posted 11-19-2018 02:43 PM



Pretty little tool.

- daiku_padawan


Thank so for the kind words. Cheers.

David

-- No one plans to fail, they just, just fail to plan

View bluekingfisher's profile

bluekingfisher

1333 posts in 3429 days


#7 posted 11-19-2018 02:45 PM



That not only looks great but will also do the business! It’s very satisfying to make your own tools and put them to good use. What tooth pattern did you create?
Jim

- Jim Rowe

Hi Jim, it’s actually just filed flat, the idea being the blade is inserted into the kerf cut and tapped down with a mallet, separating the fibres down to the scribe line.

-- No one plans to fail, they just, just fail to plan

View bluekingfisher's profile

bluekingfisher

1333 posts in 3429 days


#8 posted 11-19-2018 02:46 PM



Always nice to make tools that you will use.

- ralbuck


Thanks for taking the time to comment. Much appreciated.

David

-- No one plans to fail, they just, just fail to plan

View bluekingfisher's profile

bluekingfisher

1333 posts in 3429 days


#9 posted 11-19-2018 02:47 PM

Once again pal you ve outdone yourself….The saw kerf tool looks great….You ve really gotten into the saw business….and making this one yourself is a winner….Nice going, friend, and keep up the good work…..!!

- Rick Dennington


Hey Amigo, thanks for taking the time to comment, mate. Just need to,start cutting some half laps to use it on. Lol.

David

-- No one plans to fail, they just, just fail to plan

View bluekingfisher's profile

bluekingfisher

1333 posts in 3429 days


#10 posted 11-19-2018 02:48 PM



Nice creative tool.

- swirt

Thanks swirt, glad you liked it.
David

-- No one plans to fail, they just, just fail to plan

View bluekingfisher's profile

bluekingfisher

1333 posts in 3429 days


#11 posted 11-19-2018 02:50 PM

Thanks all for taking the time to look and comment. It looks like the post made it to #1.

Thanks again all.

David

-- No one plans to fail, they just, just fail to plan

View a1Jim's profile

a1Jim

117688 posts in 4026 days


#12 posted 11-19-2018 03:57 PM

Interesting but I’m not really clear what this is supposed to do?

View bluekingfisher's profile

bluekingfisher

1333 posts in 3429 days


#13 posted 11-22-2018 11:20 AM



Interesting but I m not really clear what this is supposed to do?

- a1Jim

As mentioned in my post – when cutting stopped dovetails, such as in a drawer front, the saw Kerf will be at 45 degrees to the face of the drawer. To make chopping of the waste simple, insert the blade of the tool into the kerf cut and tap down. This will sever the wood fibres and so ensure the kerf cut is now parallel with the face of the drawer. If still intrigued then have a look on Rob Cosman website. He has a video of the tool in action.

-- No one plans to fail, they just, just fail to plan

View GR8HUNTER's profile

GR8HUNTER

6326 posts in 1161 days


#14 posted 11-22-2018 03:23 PM

this is one wonderful tool David would work on other things also GREAT JOB :<))) GRATZ TOP 3

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

View a1Jim's profile

a1Jim

117688 posts in 4026 days


#15 posted 11-23-2018 02:29 PM

Thanks for the info Bluekingfisher

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